Apple even lets you do trade in directly through them. However, any program will almost guaranteed get you less than if you sold it yourself. The trade in basically takes the item you trade in, and then resells it. So if your model is going for say $80 on eBay, then you may get $50 for it since they need to turn a profit themselves. By all means, shop around and see what rates you would get, but you may do better to sell it yourself.